Raspberry Pi Forums

I would like to build a custom card reader. I would like it to be able to write data to a card and also modify/delete data. I am deciding between to readers to buy. An RFID reader https://www.aliexpress.com/item/125-KHz ... ncQAvD_BwE, and a swipe reader https://www.newegg.com/Product/Product. ... lsrc=aw.ds. I have a Raspberry Pi 3 and 0 W. I am wondering what reader I should use, and if it is possible to do what I want. Thanks!

Edit: Scroll down for the actual RFID.

Wait, the RFID one is a reader. WHY, GOOGLE!!!

This might help.

https://www.amazon.com/dp/B01J3MIGKQ/re ... 7294722181

OK, this is my preference. https://www.robotshop.com/en/monk-makes ... D_BwE#What Will it work!!??

It should. You want to look for something like "RC-522". Note that the RC-522 readers/writers that can be driven by a Raspberry Pi without an additional power supply have a very short range: they are contact or near-contact devices. Also, stick to 13.56Mhz RFID for cheap card options. You can sometimes reuse the very few bytes left in a used two-journey or day pass transit ticket for your own purposes. No, you can't reprogram them to add journeys …

scruss wrote: ↑

Sun Mar 04, 2018 4:14 pm

Also, stick to 13.56Mhz RFID for cheap card options.

The one that I want is 13.5MHz. The model is MFRC522. This guy does a pretty good job of explaining it. https://www.youtube.com/watch?v=s04xqAGXvbg

Myles9 wrote: ↑

Sun Mar 04, 2018 4:19 pm

The one that I want is 13.5MHz.

Will this one work with it? https://www.adafruit.com/product/921 It's 13.56MHz.

scruss wrote: ↑

Sun Mar 04, 2018 4:14 pm

You want to look for something like "RC-522".

Aha! If you zoom into the first picture on https://www.amazon.com/Clever-Card-Kit- ... B073TYR4FF, you can see the RFID reader/writer in the bottom right, and it says "RC-522"!

Myles9 wrote: ↑

Mon Mar 05, 2018 12:17 am

Myles9 wrote: ↑

Sun Mar 04, 2018 4:19 pm

The one that I want is 13.5MHz.

Will this one work with it? https://www.adafruit.com/product/921 It's 13.56MHz.

Yep.